CN210597270U - Thawing device for treating island-shaped permafrost - Google Patents
Thawing device for treating island-shaped permafrost Download PDFInfo
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- CN210597270U CN210597270U CN201920871476.0U CN201920871476U CN210597270U CN 210597270 U CN210597270 U CN 210597270U CN 201920871476 U CN201920871476 U CN 201920871476U CN 210597270 U CN210597270 U CN 210597270U
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Abstract
The utility model relates to a thawing device for processing island-shaped permafrost, wherein a thawing pipe is arranged in a drill hole uniformly distributed in an island-shaped permafrost region, the thawing pipe comprises an outer pipe and an inner pipe, the inner pipe is inserted into the outer pipe, and the bottom of the thawing pipe is communicated; the top end of the outer pipe is connected with the low-temperature hot brine branch pipe, the top end of the inner pipe penetrates out of the pipe wall of the outer pipe and is connected with the high-temperature hot brine branch pipe, and hot brine is input into the drilled hole through an external heat supply system, so that frozen soil is heated and thawed. The utility model discloses utilize heating system and unfreeze the pipe and constitute the firing equipment to frozen soil drilling, the mode through the heat exchange is to the island processing of unfreezing of perennial frozen soil, provides a new thinking of handling frozen soil.
Description
Technical Field
The invention relates to a frozen soil treatment method, in particular to a thawing device for treating island-shaped permafrost.
Background
Island frozen soil, also called discontinuous frozen soil, is in a degradation state due to discontinuous distribution, uneven thickness of the frozen soil and extremely poor thermal stability, so that after a roadbed is built, the phenomena of thaw deformation, uneven settlement, cracking and the like can occur, and engineering treatment measures need to be taken. Shallow island frozen soil is subjected to excavation and replacement filling treatment, island frozen soil with large burial depth can be subjected to composite foundation treatment, and lines pass through the composite foundation through a bridge under difficult conditions. Currently, grouting is an effective method for treating island-shaped frozen soil foundations, and the precondition is that the island-shaped frozen soil is completely melted.
Disclosure of Invention
The invention aims to provide a thawing device for treating island-shaped permafrost and provides a new idea for treating the permafrost.
The technical scheme adopted by the invention is as follows:
the utility model provides a handle thawing apparatus of island perennial frozen soil which characterized in that:
arranging unfreezing pipes in the drill holes uniformly distributed in the island-shaped permafrost region, wherein each unfreezing pipe comprises an outer pipe and an inner pipe, the inner pipes are inserted into the outer pipes, and the bottoms of the inner pipes are communicated; the top end of the outer pipe is connected with the low-temperature hot brine branch pipe, and the top end of the inner pipe penetrates out of the pipe wall of the outer pipe and is connected with the high-temperature hot brine branch pipe.
The outer tube includes that the upper outer tube of PPR on upper portion and the lower extreme of lower part seal seamless steel outer tube, and the two passes through screw thread or flange joint.
The low-temperature hot brine branch pipes connected from the drill holes are converged into a low-temperature hot brine main pipe and are connected into a brine tank from the upper part;
the high-temperature hot brine branch pipes connected from the drill holes are converged into a high-temperature hot brine main pipe and are connected into a brine tank from the lower part.
The high-temperature hot brine main pipe is provided with a brine pump.
The brine tank is filled with hot brine and is provided with an electric heating tube.
The invention has the following advantages:
the invention provides a new idea for treating frozen soil, which utilizes a heating system and a thawing pipe to form heating equipment for drilling frozen soil, and conducts thawing treatment on island-shaped permafrost in a heat exchange mode.
Drawings
FIG. 1 is a schematic diagram of a forced-thaw heating system;
fig. 2 is a schematic diagram of the design of the defrosting tube structure.
Fig. 3 is a schematic plan view of a borehole.
In the figure, 1-an electric heating pipe, 2-a brine tank, 3-hot brine, 4-a brine pump, 5-a high-temperature hot brine main pipe, 6-a high-temperature hot brine branch pipe, 7-a low-temperature hot brine main pipe, 8-a low-temperature hot brine branch pipe, 9-a drill hole, 10-a PPR upper outer pipe, 11-a PPR inner pipe with openings at two ends and 12-a seamless steel outer pipe with a closed lower end.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
The invention relates to a thawing device for treating island-shaped permafrost, wherein thawing pipes are arranged in drill holes 9 uniformly distributed in an island-shaped permafrost region, each thawing pipe comprises an outer pipe and an inner pipe, the inner pipes are inserted into the outer pipes, and the bottoms of the inner pipes are communicated; the top end of the outer pipe is connected with a low-temperature hot brine branch pipe 8, and the top end of the inner pipe penetrates out of the pipe wall of the outer pipe and is connected with a high-temperature hot brine branch pipe 6. The outer pipe comprises an upper PPR outer pipe 10 at the upper part and a lower closed seamless steel outer pipe 12 at the lower end, and the upper PPR outer pipe and the lower closed seamless steel outer pipe are connected through screw threads or flanges.
The low-temperature hot brine branch pipes 8 from the drill holes 9 are converged into a low-temperature hot brine main pipe 7 and are connected into the brine tank 2 from the upper part; the high-temperature hot brine branch pipes 6 from the drill holes 9 are converged into a high-temperature hot brine main pipe 5 and are connected into the brine tank 2 from the lower part. The high-temperature hot brine main pipe 5 is provided with a brine pump 4. The brine tank 2 is filled with hot brine 3 and is provided with an electric heating tube 1.
The process method of the thawing device for treating the island-shaped permafrost comprises the following steps:
the method comprises the following steps: the unfreezing pipe is hung in the drill hole 9, the top end of the outer pipe of the unfreezing pipe is connected into the low-temperature hot brine branch pipe 8, and the top end of the inner pipe penetrates out of the pipe wall of the outer pipe and is connected into the high-temperature hot brine branch pipe 6;
step two: collecting the low-temperature hot brine branch pipes 8 from the drill holes 9 into a low-temperature hot brine main pipe 7, connecting the low-temperature hot brine main pipe to the brine tank 2 from the upper part, collecting the high-temperature hot brine branch pipes 6 from the drill holes 9 into a high-temperature hot brine main pipe 5, and connecting the high-temperature hot brine main pipe to the brine tank 2 from the lower part;
step three: starting an electric heating tube 1 to heat hot brine 3 in a brine tank 2;
step four: the brine pump 4 is started, hot brine 3 in the brine tank 2 flows into the high-temperature hot brine branch pipe 6 through the high-temperature hot brine main pipe 5 and enters the inner pipe of the unfreezing pipe in the drill hole 9, then enters the outer pipe through the inner pipe, the temperature of the hot brine 3 is reduced after heat exchange, the hot brine enters the low-temperature hot brine branch pipe 8 through the outer pipe, and then the hot brine enters the low-temperature hot brine main pipe 7 and flows back into the brine tank 2.
And (3) arranging temperature measuring holes around the drill hole 9, and when the ground temperature in the temperature measuring holes is higher than 1 ℃ and the ground temperature curve is gradually flattened from linear rising, the thawing is considered to be finished.
Example (b):
the thawing device of the invention consists of a heat supply system and a thawing pipe.
1. The heating system comprises an electric water tank, a brine pump, a PPR hot brine main pipe, a PPR hot brine branch pipe and the like. The water temperature at the water outlet is 70 +/-5 ℃, and the flow is 60m3/h。
(1) Volume of the electric heating water tank is 2m3The heat insulating material is filled between the water tank and the casing, the water tank is filled with salt water, and the temperature of the salt water is controlled to be 70 +/-5 ℃. Technique ofParameters are as follows: volume of water>2000 l, heating power>100KW, timing heating, timing water supply, over-temperature alarm (75 deg.C over-temperature alarm), water shortage alarm (automatic switching off power supply of heating pipe and alarm when extremely low water level occurs).
(2) The water pump adopts IS-80-65-160 model, and the performance parameters are as follows: power 7.5KW, flow 60m3H, head 32m, suction head 7m, and efficiency 73%.
(3) The inlet and the outlet of the water tank are connected with a PPR hot water main pipe which comprises a high-temperature saline water main pipe and a low-temperature saline water main pipe, the inner diameter of the pipes is 180mm, the wall thickness is 2.5mm, the temperature resistance is 95 ℃, and the pressure resistance is 1.6 MPa.
The high-temperature hot water main pipe and the low-temperature hot water main pipe are respectively provided with 6 PPR hot water branch pipes, including a high-temperature saline water branch pipe and a low-temperature saline water branch pipe. The high-temperature saline branch pipe is connected with the inner pipe of the unfreezing pipe, and the low-temperature saline branch pipe is connected with the outer pipe of the unfreezing pipe. The inner diameter of the branch pipe is 70mm, the wall thickness is 2.5mm, the temperature resistance is 95 ℃, and the pressure resistance is 1.6 MPa.
(4) An intelligent hot water meter can be mounted on a PPR hot water main pipe at the water outlet of the water tank, and the intelligent hot water meter has the functions of recording and electronically displaying water consumption, controlling water consumption, storing water consumption data and the like.
The technical performance of the intelligent hot water meter is as follows: the measured water temperature is 0-90 ℃, the working pressure is 0.02-1 MPa, and the working environment temperature is 0-60 ℃. The technical parameters are as follows: caliber of 80mm and common flow rate of 63m3H, minimum flow 1.26m3H, maximum reading 999999m3Minimum reading 0.001m3Life of battery>For 6 years.
When the water meter is installed, the direction of an arrow on a meter shell is consistent with the direction of water flow, and the installation is horizontal. The water meter mounting position should avoid insolation, and convenient to detach and observe, should take heat preservation measure when necessary. The water meter is strictly forbidden to place any articles above. Attention is paid to moisture prevention, moisture prevention and strict prohibition of water drops from infiltrating into the water meter controller so as to prevent the control system of the water meter from being damaged.
2. The thawing pipe consists of two parts, including one outer pipe and one inner pipe, connected to the top ends of the outer pipe and the inner pipe separately, and is used to thaw frozen soil with circulating hot salt water inside the pipe. The defreezing pipe is arranged in the phi 110 drill hole and is about 50cm higher than the ground, and the outer pipe is formed by connecting an upper phi 100PPR hot water pipe and a lower phi 100 seamless steel pipe through screw threads or flanges. The wall thickness of the PPR hot water pipe is 2.5mm, the enduring temperature is 95 ℃, and the enduring pressure is 1.6 MPa. The wall thickness of the seamless steel tube is 2mm, the length is 5m, and the bottom is closed.
The inner pipe adopts a phi 70PPR hot water pipe, the wall thickness is 2.5mm, the enduring temperature is 95 ℃, the enduring pressure is 1.6MPa, the bottom end of the inner pipe is 20cm higher than the bottom end of the outer pipe, and the inner pipe and the outer pipe form a communicating pipe.
The process flow comprises the following steps:
(1) assembling: and respectively assembling a heat supply system and a thawing pipe.
(2) And (3) checking air tightness: and after the unfreezing pipe is determined to have no leakage phenomenon, the unfreezing pipe is hung into the drill hole and is connected with the heat supply system. Checking the air tightness of the thawing device, and starting a water tank power supply to heat after confirming that no air leakage occurs.
(3) Unfreezing: and starting a power supply of the water tank, and starting a thawing system of the brine pump to work after the brine is heated to a preset temperature.
(4) Measuring the ground temperature: and (5) observing the ground settlement and the ground temperature change condition in the temperature measuring hole. Thawing is considered complete when the earth temperature is >1 ℃ and the earth temperature curve levels off from a linear rise.
(5) The next set of wells was thawed: after the group of holes are thawed, the power supply (the water tank and the water pump) is turned off, and the thawing pipe is moved out to begin to thaw the next group of holes.
(6) And (3) thawing completion: and after the thawing is finished, disassembling the thawing device. The power should be turned off before the thawing apparatus is disassembled.
(7) Note that:
1) the installation, debugging and operation of the unfreezing system are responsible for professional technicians.
2) During the operation, attention should be paid to prevent scald and electric shock.
3) Silt or other impurities are strictly prevented from being mixed into the saline solution.
4) The device system should be stopped during rest. The unfreezing pipe should be moved out when the box does not work for a long time in winter, and water cannot be left in the box and the pipe.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (5)
1. The utility model provides a handle thawing apparatus of island perennial frozen soil which characterized in that:
arranging unfreezing pipes in drill holes (9) uniformly distributed in the island-shaped permafrost region, wherein each unfreezing pipe comprises an outer pipe and an inner pipe, the inner pipes are inserted into the outer pipes, and the bottoms of the inner pipes are communicated; the top end of the outer pipe is connected with a low-temperature hot brine branch pipe (8), and the top end of the inner pipe penetrates out of the pipe wall of the outer pipe and is connected with a high-temperature hot brine branch pipe (6).
2. A thawing apparatus for island-like permafrost treatment according to claim 1, wherein:
the outer tube comprises an upper PPR outer tube (10) at the upper part and a lower closed seamless steel outer tube (12) at the lower part, and the upper PPR outer tube and the lower closed seamless steel outer tube are connected through screw threads or flanges.
3. A thawing apparatus for island-like permafrost treatment according to claim 2, wherein:
the low-temperature hot brine branch pipes (8) connected from the drill holes (9) are converged into a low-temperature hot brine main pipe (7) and are connected into the brine tank (2) from the upper part;
the high-temperature hot brine branch pipes (6) connected from the drill holes (9) are converged into a high-temperature hot brine main pipe (5) and are connected into the brine tank (2) from the lower part.
4. A thawing apparatus for island-like permafrost treatment according to claim 3, wherein:
the high-temperature hot brine main pipe (5) is provided with a brine pump (4).
5. A thawing apparatus for island-like permafrost treatment according to claim 4, wherein:
the brine tank (2) is filled with hot brine (3) and is provided with an electric heating tube (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920871476.0U CN210597270U (en) | 2019-06-11 | 2019-06-11 | Thawing device for treating island-shaped permafrost |
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| CN201920871476.0U CN210597270U (en) | 2019-06-11 | 2019-06-11 | Thawing device for treating island-shaped permafrost |
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| CN210597270U true CN210597270U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110172963A (en) * | 2019-06-11 | 2019-08-27 | 中铁第一勘察设计院集团有限公司 | Handle the thawing apparatus and process of island-shaped permafrost soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110172963A (en) * | 2019-06-11 | 2019-08-27 | 中铁第一勘察设计院集团有限公司 | Handle the thawing apparatus and process of island-shaped permafrost soil |
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